| Relationships | Role | Relationship Start | Relationship End |
| Southwest Bancorp | Parent | 10/31/1981 | 10/19/1989 |
| S.W. Financial Services | Subsidary | 3/31/1987 | 10/19/1989 |
| S.W. Mortgage, Inc. | Subsidary | 10/31/1981 | 2/14/1989 |
| Southwest Thrift & Loan Association | Subsidary | 12/31/1982 | 10/16/1988 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| South Hope Street Branch | Buyer | Discontinued | 10/20/1989 | ||
| Southwest Thrift & Loan Association | Seller | 16,515 | Discontinued | 10/17/1988 | |
| Mission Bank | Seller | 34,987 | Discontinued | 7/29/1977 |